Optical module

Abstract

To provide an optical module capable of improving the workability for a circuit substrate, in the rear of a shield case ( 22 ), a pressing portion ( 27 ) for holding an FOT ( 6 ) is formed to press a back surface of a package portion ( 9 ) of the FOT ( 6 ). In the rear of the shield case ( 22 ), a stress countermeasure portion ( 28 ) is formed to distribute or mitigate a stress occurring due to deformation and displacement of the pressing portion ( 27 ). The stress countermeasure portion ( 28 ) is formed between the pressing portion ( 27 ) and a substrate connection portion ( 16 ). The stress countermeasure portion ( 28 ) is formed in the vicinity of the pressing portion ( 27 ). In a small space between a base (or bend portion) of the pressing portion ( 27 ) and the stress countermeasure portion ( 28 ), the force in a twist direction acts due to the occurred stress. This force is distributed or absorbed according to presence and shape of the stress countermeasure portion ( 28 ).

1. An optical module, comprising:
 a fiber optic transceiver (FOT) having a light emitting element and/or a light receiving element; 
 a shield case covering and shielding the FOT; 
 a pressing portion formed in the shield case and directly or indirectly contributing to positioning the FOT, and 
 a stress countermeasure portion formed between the pressing portion and a substrate connection portion of the shield case and distributing, absorbing, or mitigating a stress due to deformation and displacement of the pressing portion. 
 
     
     
       2. The optical module according to  claim 1 , wherein a formation range of the stress countermeasure portion is set to a range equal to or more than a width of the pressing portion and a range more than a width of the substrate connection portion. 
     
     
       3. The optical module according to  claim 1  or  2 , wherein the stress countermeasure portion is arranged and formed around the pressing portion.